一种低功耗数字阀建模、性能分析及试验验证

doi:10.7527/S1000-6893.2024.30747

Abstract

Abstract:

The high-speed switching digital valve is a critical control component in aviation hydraulic systems， directly impacting aircraft performance and operational safety. The response time serves as the primary indicator for evaluating digital valves. By enhancing the excitation voltage， the dynamic characteristics can be effectively improved， but this can lead to excessive energy consumption and temperature rise， resulting in performance degradation such as reduction in electromagnetic force and even safety accidents like breakdowns or burns. To solve these issues， a novel low-power digital valve was proposed to incorporate a permanent magnet into the magnetic circuit. This design allows the valve to maintain its working state using its magnetic field while instantaneous voltage excitation only occurs during opening and closing processes to reduce power consumption. This approach helps alleviate the design contradiction between high response speed and low temperature rise of digital valves. Based on this concept， the theoretical models and finite element models were established for low-power digital valves under hybrid excitation from both permanent magnet magnetic fields and electromagnetic fields respectively. The influence of key parameters are studied on electromagnetic characteristics， dynamic characteristics， and energy consumption characteristics. Finally， the test bench for digital valves were constructed to verify simulation model and analysis results. The test results demonstrate that compared to the traditional digital valve with advanced control method， the low-power digital valve exhibits a 49.3% reduction in opening response time， a 35.6% reduction in closing response time， and a 20% extension of the flow controllable range. Additionally， under high duty cycle conditions， the temperature rise of the low-power digital valve can be reduced by up to 40 ℃ without being affected by the duty cycle. Therefore， the implementation of low-power digital valves holds significant importance for enhancing aviation hydraulic system performance and safety.

Key words: low-power consumption, digital valve, magnetic couplings, dynamic characteristics, static characteristics, temperature rise

CLC Number:

V249.1

Jing YAO, Shuai YANG, Mengyang WANG, Pei WANG. Modeling, performance analysis and test verification of a low-power digital valve[J]. Acta Aeronautica et Astronautica Sinica, 2025, 46(2): 430747.

Figures/Tables 33

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References 28

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序号	参数	数值
1	最大阀芯位移/mm	0.28
2	阀口直径/mm	0.6
3	阀芯半锥角/（°）	45
4	线圈电阻/Ω	8.5
5	线圈匝数/匝	500
6	运动组件质量/g	5
7	弹簧刚度/（N·mm^-1）	2.55
8	弹簧预紧力/N	12.5
9	衔铁直径/mm	5
10	初始工作气隙长度/mm	0.28
11	永磁体尺寸/mm	∅6×4.5

设备	量程	精度
采集卡	0~100 kS/s	16 bit
高频压力传感器	0~250 bar	±0.25%
流量传感器	0.01~10 L/min	±0.3%
电流传感器	0~2 A	±0.25%
温度传感器	0~300 ℃	0.5%

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Modeling, performance analysis and test verification of a low-power digital valve

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